60 Teeth Timing Belt Pulley 5mm Bore for 3D Printer & CNC Machines - 6mm Width Belt (Pack of 2) with Wrench - Perfect for DIY 3D Printing Projects & CNC Machinery Maintenance

These are not the same pulleys shown in the picture. The edges or side guide are much too tall. They extend .125" beyond the gear tops and, in some applications (as for mine), prevent the belt from seating against the gears. The wheel that the belt sits on, if wider than 6mm, may prevent the belt from seating on the gears. In my case, the belt did not even touch the gears of the pulley.